No, my phone went into SOS mode yesterday. No apps, just a button to call 911. And yes, if you lose a ticket, you can indeed miss a flight. Only tale I have for that is a colleague who lost their ticket and the time it took to look up their details put them past boarding, they were stranded at the terminal, but its still an actual risk you can't wave away.
It takes 5 minutes to save an insane amount of stress and misfortune.